-import { OCPP16AvailabilityType, OCPP16BootNotificationRequest, OCPP16IncomingRequestCommand, OCPP16RequestCommand } from './1.6/Requests';
+import type ChargingStation from '../../charging-station/ChargingStation';
+import type OCPPError from '../../exception/OCPPError';
+import type { JsonType } from '../JsonType';
+import { OCPP16DiagnosticsStatus } from './1.6/DiagnosticsStatus';
+import type { OCPP16MeterValuesRequest } from './1.6/MeterValues';
+import {
+ OCPP16AvailabilityType,
+ OCPP16BootNotificationRequest,
+ OCPP16HeartbeatRequest,
+ OCPP16IncomingRequestCommand,
+ OCPP16RequestCommand,
+ OCPP16StatusNotificationRequest,
+} from './1.6/Requests';
+import type { MessageType } from './MessageType';